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N-Carbobenzoxy-N-chloroglycine methyl ester is a key intermediate used in the synthesis of N-carbobenzoxy-protected α-alkoxyglycines, which are unnatural amino acids with an electronegative oxygen atom at the α-carbon. In this study, it was treated with a base in the presence of alcohols to produce α-alkoxyglycine esters, which were further processed into free acids for peptide synthesis. This method facilitates the preparation of peptide analogs containing p-oxa analogs of α-amino acids.

129778-98-9

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129778-98-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129778-98-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,7,7 and 8 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 129778-98:
(8*1)+(7*2)+(6*9)+(5*7)+(4*7)+(3*8)+(2*9)+(1*8)=189
189 % 10 = 9
So 129778-98-9 is a valid CAS Registry Number.

129778-98-9Relevant academic research and scientific papers

Preparation of protected α-alkoxyglycines

Kawai, Masao,Hosoda, Kouji,Omori, Yoshimasa,Yamada, Keiichi,Hayakawa, Shoko,Yamamura, Hatsuo,Butsugan, Yasuo

, p. 1545 - 1554 (1996)

N-Carbobenzoxy-α-alkoxyglycine esters were synthesized by H2SO4-catalyzed O-alkylation of N-carbobenzoxy-α-hydroxyglycine and also by base treatment of N-carbobenzoxy-N-chloroglycine methyl ester in the corresponding alcohol. Saponification of the protected α-alkoxyglycines gave free acids which can be used for the synthesis of α-alkoxyglycine residue-containing peptides.

Preparation of Protected α-Methoxyglycine and Its Incorporation into Peptide Synthesis

Kawai, Masao,Neogi, Partha,Khattri, Parth S.,Butsugan, Yasuo

, p. 577 - 580 (2007/10/02)

A protected α-methoxyglycine Cbz-DL-Gly(OMe)-OMe (1) was prepared from the N-chloro derivative of Cbz-Gly-OMe.Catalytic hydrogenolysis of 1 in the presence of a mixed anhydride prepared from a Boc-amino acid and ClCO2Bui gave a diastereomeric p

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